Title:
Concrete Mix Proportioning and
Prediction of Field Performance Using Mun-morah
fly ash
Author(s):
P. Nelson, J. B. Ashby, and C. J. Tyndall
Publication:
Concrete International
Volume:
4
Issue:
7
Appears on pages(s):
16-23
Keywords:
compressive strength; concretes; durabili-ty;
field tests; fly ash; laboratories; mix proportioning;
performance tests; pozzolan cements; splitting tensile
strength; tests.
DOI:
Date:
7/1/1982
Abstract:
Fly ash has been used in concrete for capital works on New South Wales power stations since 1959. Up to 1971, the fly ash content of the concrete was generally limited, and the specifications were modified to require concrete strength testing at 60 days. A testing program was undertaken to provide concrete mix proportion information for use in the construction of the extension of Vales Point power station. Consideration was given in this program to specification of compressive strength at 28 days. Preparation of the Australian Standards 1129 and 1130 Fly ash for use in concrete," recognizing the potential of the fly ash then available, was being undertaken at this time. Pozzolanic Pty. Ltd., a member of the BMI ltd. Group, wassuccessful in securing the contract to proportion, produce, and evaluate the concrete mixes. This article deals with the work performed under the contract entailing concrete mix proportions using both Type A and Type C cements (similar to ASTM Type I and IV, respectively) and requirements for compressive strength up to age 365 days. Results of indirect tensile strength tests for concrete at 7 and 28 days are also included.